Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the cane sugar, light brown sugar, and melted coconut oil until well combined.
Add in the egg, egg yolk, and vanilla extract to the sugar mixture. Whisk until smooth and creamy.
In a separate bowl, sift together the matcha powder, baking soda, sea salt, and all-purpose flour. Gradually add this dry mixture to the wet ingredients, mixing until just combined.
Gently fold the white chocolate chips into the dough, ensuring they are evenly distributed.
Using a cookie scoop or two tablespoons, scoop out the dough and roll it into balls. Place them on the prepared baking sheet, spacing them about 2 inches apart.
Lightly sprinkle the tops of the cookie dough balls with black sesame seeds for an extra touch of flavor and visual appeal.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden but the centers are still soft. Remove from the oven and let them cool on the baking sheet for about 5 minutes before transferring them to a cooling rack.